Centrifugal machine.



' PATBNTED APR. 15, 1907.

E. A. PORSBERG. OENTRIFUGAL MACHINE.

APPLICATION FILED I-IAY19.1905.

- the scraper-Wheels.

.side the bowl by ineensof the bowl it is diflicult to jo rnal i523PATIENT @lifiilwiil.

ERIK AUGlll-ST FURSBiERG- 0F Sl.(,)

AKTTEBULAGET SEPAHATUR, 0F S'TOCKHOLId KT'TK'JLM, SWEDEN, ASSTGNOR TOQWEDEN ribeurrui uism. luscious.

Specification of Letters Patent.

Patented April is, 190?.

Application filed May 19,1905. Serial No. 261,136.

ters from Liquids; end i. do hereby declare f' the following to be :1iii ll, clear, and exact descrlption of the invention, such as willenable others skilled iii the art to which it uppen tain-S to make anduse the same, reference beiugvhad to the accom iunyiu drawings, and toletters or figures of reference :inerkcd thereon, which form u. part ofthis specifics.- tion.

My invention relates to improvements in centrifugal separators such asused for separating liquids from solid matters, and more especially toseparators of such ert os de scribed in my United States Patent No.773,489; and it more mrticularly relates to arrangements for fit*ilitetiugthe motion of scribed in the said United States Patent No. 773,489, the solid matters that stratify along the inner wall of the bowlare brought out-- scraper-wlieels carrying the solid matterstransversely through the layer of liquid to a point Within the samenearer the center of the bowl, whence the solid matters are continuouslycarried away in such a mzinner'that they immedietely before the scrapersof the scraper-- wheels occupy their iosition nearest the center of thebowl, owing to the action of the centrifugal. force and their own.gravity, are loosened. from the scrapers and then thrown downwardthrough a central opening into a. partition. placed under t esi'xrsper-wheels or 111 the very bottom of the bowl. Thesescraper-Wheels are secured to cog-wheels gearing with a. cog-ring, endin this way they Willreceive their rotary moti u. it is, however,obvious that by high rotary speed of the cog- Wheels andSCYQIXBT-WYi100l8 i :1. satisfactory manner on account of the action ofthe centrifugal force, and besides it is impossible to lubricate theparts as they are fully immersed in the mixture of fluid sud solidmatters.

Mv present invention has for object o. de vi 1e )y which theseinconveniences are ovoid- Said device is illustrated 011 the a1inexeddrawiugsp-where- As is more fully. dew

Figure l. is :1. vertical section of a. centrifugal loo wl with myimprovements applied thereto. l 1;. 2 shows the some bowl in lan view,the cover and the upper rolling surface being re moved. i

The bowl is composed of an upper part or cover a and an under part orbottom I), screwed together in the usual manner. he

be )in is provided. with a central circular orifice, the, edges of whichincline outward. The driving-shal'tc of the bowl is enlarged at the topto a flange (1, riveted to the bottom of the bowl or integral therewith.Between the flange (1 and the bottom l; of the bowl chan nels e e arelocated. The driving-shaft c is hollow, and within the some the massiveshaft f moves. At the top of said massive sh rift the nave g of thecross-piece h is secured by pin 1. This cross piecc h is at its endsprovided with circular holes located in the very edge of the ends of thecross-piece, so that these holes open outward. lnunedietely above thecross-piece h a. circular disk 01 is' located, said disk being securedto the cover a by means of stays or the like. Fur-- thermore, the disk iis provided with u central circular boring, so that an annular rollingsurface is is formed.

in the bottom 6 of the bowl o ring Z is located in ii circular grooveformed in. the. bot tom. The ring is located just below the ringshapededge of the disk i. Between said dish i and the bottom I) of the bowlthe scraper-wheels n n are placed, which are pro vided with scrapers oof scoop or shovel sluipe. The moves 1) of said shovel-wheels aresomewhat extended upward and downward, thus forming wives. Said naves ppress hard against the rolling surfaces and in when the bowl rotates, sothat a consider able friction between said parts arises. On account ofthis friction the haves roll along the surfaces lc and m soon as thecrosspiece It movesrelstive to the bowl. Sold motion. is imported to thecross-piece h by means of the massive slnftf rotating with. a l'lig'hcror lower speed than the hollow shaft 0. Thus as the cross-piece It movesrelative/to the bowl it is evident that the scraper-wheels rotate notonly on their own axes, but also that said axes receive a. rotarymovement around the center axis of the bowl. In this way a planetarynioven'ient is imported to the scraper-wheels, so that they successivelythrough the layer of liquid to the center of the bowl. Arriving at thispoint they are thrown off from the scrapers and slide down the inclinedsurface of the orifice 1n the bottom I) to the channels e, from wherethey leave the bowl.

What I claim is- 1. In a centrifugal machine, the combination with therotary bowl, of a hollow shaft, there being an outlet between the wallsof the bowl and the shaft, a second shaft projecting through said hollowshaft into the interior of the bowl, across-piece rigidly secured tosaid second shaft within the bowl and embracing the naves of one or morescraper-wheels, imparting to them a planetary movement along the entireperiphery of the bowl, and a ring within the bowl havingcontact-surfaces in frictional contact with said scraper-wheels forimparting a rotary movement to said scraper-wheels around their ownaxes.

2. Ina centrifugal machine, the combination with a rotary bowl, of oneor more scraper-wheels rotatably mounted, and movable around the bowl,and a'disk within the bowl having a contact-surface, said scraperwheelsbeing in frictional contact with said surfaces.

3. In a centrifugal machine, the combination with a rotary bowl, of oneor more scraper-Wheels rotatably mounted and movable around the bowl, adisk within the bowl having a contact-surface, said scraper-wheels beingin frictional contact with saizl surface, the scraper-Wheels and diskbeing supported to be adapted to have a differential rotation withrespect to each other on the axial line of the bowl.

4. In a centrifugal machine, the combination with a rotary bowl, of oneor more scraper-wheels rotatably mounted, a disk having a contact;surface, said scraper- .wheels being in frictional contact withsaidsurface, said disk and scraper-wheels being supported to' be adaptedto move around on the axisof the bowl at different speeds.

, 5. In a centrifugal machine, the combination with a rotary bowl, ofone or more scraper-wheels rotatably mounted, and movable around thebowl, and adisk hav ing contact-surfaccs corresponding to saidscraperwheels in frictional contact with the scraperwheels, said diskbeing connectedwitl'i the bowl. v

(3. In a centrifugal mach ne, the combination with a rotary bowl, of oneor more s' :i'a' erwheels rotatably mounted, a disk having acontact-surface in frictional contact with said scraper-wheels, saiddisk being connected with the bowl, and said scraperwheels being adaptedto move on the axisyf' the bowl at a speed different from that of therotation of the disk.

7. In a centrifugal machine, the combination with a rotary bowl, of oneor more r0- tating scraper-wheels therein for conveyin the solid matterssix-ratified on the wall of sai bowl to a point near the central line ofthe ,tion with a-rotary bowl, of one or more rotating scraper-wheelstherein forconveyin the solid matters stratified on the wall .of saibowl to a point near the central line of the bowl, a shaft, separatefrom the bowl-driving shaft, for driving said scra er-wheels, a diskconnected with the bowl iavin a contact-- surface in frictional contactwith the upper portion of said scra er-wheels, and a ring se cured tothe bowl raving a contact-surface "in frictional contact with the lowerportion of said scraper-wheels.

9. In a centrifugal machine, the combina- 'tion with a rotary bowl, ofone or more rotating scraper-wheels therein for conveying the solidmatters stratified on the wall ofthe said bowl to a point near thecentral line of the bowl, a shaft, separate from the bowldriving shaft,for driving said scraper wheels, a disk connected with the upper part ofthe bowl and having a contact-surface in frictional contact with theupper portion of said scraper-wheels and a rim set intd a groove in thebottom part of t e bowl and having a contact-surface in frictionalcontact with the lower portion of said scraperwheels,

10. In a centrifugal separator, the combination, with the rotary bowland itsdrivingshaft, of a secondary shaft extending within the'bowl andadapted to be rotated'at a speed different from that of the bowl,rotating scra er-whe'els within the bowl-for conveying t e solid mattersstratified on the wall to a point near the central line of the bowl, arotating member cbiisisting of a cross-piece having holes in which thenaves- .of the scraper-wheels revolve, and a dlsk having acontact-surface in frictional contact with said scraper-wheels, thecrossiece be ing connected with the secondary s aft and the disk turningwith the bowl.

In testimony that I claim the foregoing as my invention I have signed myname in presence of two subscribing witnesses.

ERIK AUGUST FORSBERG.

Witnesses:

K. E. WIBERG, HARRY ALsInN.

